brother Mortimer L. Schiff. Percival Goodman was hired to redesign the mansion, and the JTS filed plans with the DOB to convert the building into a museum in September 1944. The renovations were delayed by World War II and, in December 1945, the seminary's president Louis Finkelstein announced that work would start immediately. The first and second stories would each contain two exhibition rooms, while the third story would contain six exhibition rooms. The first story would contain the museum's lobby, and the music room on the second story would be turned into an auditorium. In January 1946, the Sheppard Pollack Company was hired to renovate the house for $100,000. The JTS opened the Jewish Museum in the mansion in 1947. The museum held a preview of its first exhibit on May 6, 1947, displaying one thousand items on the Warburg House's first two stories. Two days later, the museum formally opened to the general public. Frieda Warburg said that, when she re-entered the house for the first time after its renovation, "I discovered to my joy that instead of depressing me, it gave me a wonderful feeling of happiness." The Jewish Museum opened a third exhibition on another story of the house in November 1947. In the two years after it relocated to the Warburg House, the museum had 175,000 visitors; this number had increased to 500,000 by 1952. Adam List designed a sculpture garden next to the museum, which was dedicated in 1959. The Warburg House's former lawn was replaced with an annex in 1962. Officials laid the cornerstone for the annex on May 20, 1962. The glass annex was designed by Samuel Glaser Associates and was named for philanthropist Albert A. List, who donated $500,000 toward the project (). The Jewish Museum was temporarily closed for renovations at the end of that month. The project included installing elevators in the Warburg Mansion and a connection to the new annex. The Albert A. List Building opened in February 1963. The wing had of space for exhibitions, workshops, and a store. Upon the completion of this wing, the Jewish Museum's main entrance was relocated to the List Building, and the ground-story windows of the Warburg Mansion were blacked out. During the 1960s, following the completion of the List Building, the Jewish Museum evolved into an exhibition space for modern art. Preservation In 1970, the New York City Landmarks Preservation